Mystery Solved for What Killed Knut the Polar Bear

Experts say they finally know the reason for the seizure that caused Knut to drown in the pool in his zoo pen.

Published On 08/28/2015
11:35 AM EDT
Polar bear cub 'Knut' shakes off water in an enclosure at the Berlin Zoo. Knut, born on December 5, 2006, had to be hand fed by zoo employee Thomas Doerflein after its mother Tosca refused the baby. | Tobias Schwarz/Reuters/Corbis